Factual error: When one of the terrorists fires an RPG into the security hut, all the windows in the cars standing nearby shatter. Ordinary windshields are made of laminated glass that doesn't shatter, not to mention that at least the SUVs used to transport the prime minister and his escort would surely be armored and therefore possess security glass.
Question: As the attack on the White House is underway, a relief column is detached from a nearby military base, which is going to take 10-15 minutes to get there. Flying with the column are several Apache attack helicopters. Why do the Apaches fly with the column and not on ahead to engage the attackers asap. A couple of Apaches would have made a huge difference to the White House's defence.